Traditionally, biomedical research has been devoted to improvement in the understanding and treatment or prevention of disease. Building on the knowledge generated by the long history of disease-oriented research, the next few decades will witness an explosion of biomedical enhancements to make people faster, stronger, smarter, less forgetful, happier, prettier, and live longer (Turner et al. 2003; Vastag 2004; Rose 2002). As with other biomedical interventions, research to assess the safety and efficacy of these enhancements in humans should be conducted before their introduction into clinical practice.1 However, various concerns regarding the ethics of enhancement research could be raised. Those who ..